diff --git a/src/gba/renderers/video-software.h b/src/gba/renderers/video-software.h
index 47a0cbc56..9a7aee1e2 100644
--- a/src/gba/renderers/video-software.h
+++ b/src/gba/renderers/video-software.h
@@ -113,7 +113,7 @@ struct GBAVideoSoftwareRenderer {
 	struct GBAVideoRenderer d;
 
 	color_t* outputBuffer;
-	unsigned outputBufferStride;
+	int outputBufferStride;
 
 	GBARegisterDISPCNT dispcnt;